All of the children are collecting Gizmos out of cereal boxes. Gizmos come in different colours. The rarest on e is gold. For a while, none of the children have a gold Gizmo, but eventually, Perfect Peter gets one, and Horrid Henry tries everything he can to get his hands on it...

Horrid Henry has always had a way of sending any babysitters trying to look after him refuse to look after him again. But when Rabid Rebecca, the toughest teen in town, who every child is afraid of, comes to babysit him, it seems Henry has finally met his match.Henry discovers that his usual tactics just don't work, and he's forced to be even more inventive by teaming up with his brother Perfect Peter.

Just when Henry is settling down for a day of TV, his parents drag him out on a dreadful hike, much to his dislike. But eventully he finds out a way to hurry them home, which involves letting a bull loose...

While her parents are on holiday, Moody Margaret bunks in with Horrid Henry. However, only a single minute is enough trouble for Henry when having his arch-nemesis in the same house and/or room with him, so he decides to use his spectacular thinking to devise a plan and get Margaret kicked out.

Horrid Henry hates sports day. He never wins at a single event. So he is not happy when sports day arrives, and he must compete. However, there is a way for him to win this year, and that is if he cheats...

Mum is organizing the school fair and is on the hunt for old games and toys. Henry and Peter’s old games and toys, to be precise. Henry generously donates his Walkie-Talkie-Burpy-Slurpy-Teasy-Weasy Doll – in fact he’s glad to see the back of her. A little careful research and he’s located the mega prize in the Treasure Map too – oh, life is sweet. Or is it?

After spending some time eating school dinners, Horrid Henry is happy to be going back to having Packed Lunches for dinner time at school. But when he goes back to the Packed Lunch room for the first time in a while, he meets his new enemy - Greasy Greta, the Demon Dinner Lady. She uses the rule of 'No Sweets In School', by eating any sweets the children brought in their packed lunches. The only way to stop her is by playing her at her own game...

Henry's family dines at a fancy restaurant with Rich Aunt Ruby and Stuck-Up Steve.

It's another ordinary day for Horrid Henry, until he notices one thing: Mr. Kill is missing. Using his detective skills, Henry looks around his house and interrogates people who supposedly have the need for revenge against Henry for all of the bad deeds Henry has committed to them. With no progress, Henry decides to talk with the one person who could possibly have a good revenge against him: Perfect Peter.